JPH071779Y2 - Air purifier for cooler - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application This invention relates to an air cleaning device for a unit cooler used for electric equipment such as a transformer.

B. Outline of the Invention The present invention is a cooler configured such that cooling air is blown to a cooling pipe of a unit cooler main body by a blower fan, and foreign matter contained in the cooling air is included between the unit cooler main body and the blower fan. By installing an oil bath filter that removes foreign matter, cooling air that does not contain foreign matter is applied to the forest cooling pipe, and foreign matter is blocked in the gaps, obstructing the flow rate of airflow and reducing cooling efficiency. This is to prevent this.

C. Conventional Technology Conventionally, some electric devices such as transformers are provided with a unit cooler as illustrated in FIGS. 7 and 8 in order to prevent overheating.

This unit cooler is installed on the side of the transformer body 1, and the unit cooler body 2 has two blower fans.
Consists of 3 and 3.

This unit cooler body 2 is installed by welding several tens to hundreds or more cooling pipes 4 to a header 5 so as to stand in the case, and a radiator valve 7 is connected by a pipe 6 continuing from the header 5. Is connected to the cooling oil port 8 of the transformer main body 1 via the transformer main body 1 via the oil circulation pump 10 in the lower pipe 9 of the unit cooler main body 2.
Is connected to the cooling oil port 11. In addition, 12 is an oil flow indicator.

Each blower fan 3 has a blower fan guard screen 14 arranged in the opening of the blower fan case 13 so as to prevent foreign matter such as birds and large dust from entering the case. In addition, a fully-closed outdoor type three-phase induction motor 16 in which the blower fan blades 15 are driven to rotate,
It is installed by being held by the blower fan holder 17. The blower fan 3 is detachably attached to the unit cooler body 2 for replacing the bearing circulating grease.

Then, the cooling oil in the transformer main body 1 is circulated to the unit cooler main body 2 by operating the oil circulation pump 10, and the blower fan blades 15 are rotated to blow the cooling oil to many forest cooling pipes 4. , To cool.

D. Problems to be solved by the invention The conventional unit cooler as described above has the blower fan 3
Birds and large debris are sucked into the inside of
In order to prevent the occurrence of an accident by hitting the blower fan blades 15, only the blower fan guard screen 14 having a considerably coarse mesh is provided.

For this reason, when the unit cooler is used in a dusty atmosphere, relatively fine foreign matter dust that cannot be removed by the blower fan guard screen 14 is sucked into the blower fan and blown into the gap of the forested cooling pipe 4, and the portion thereof is blown. It may adhere to the surface and hinder the smooth flow of air. Then, there is a problem that the cooling efficiency of the unit cooler is lowered, which eventually raises the temperature in the transformer.

In view of the above-mentioned points, the present invention uses a blower fan to remove foreign matter,
An object of the present invention is to prevent the dust of the cooling pipe from being blown by blowing the dust-removed air through the cooling pipe to prevent the cooling efficiency from decreasing.

E. Means for Solving the Problems In the air purifying device for a cooler of the present invention, a blower fan is arranged in the unit cooler body via an oil bath filter section,
In the case of the oil bath filter section, a filter screen in which a mesh material is formed in an endless shape is supported and arranged by a plurality of sprocket wheels, and at least one of the sprocket wheels is rotated in conjunction with an electric motor. Thus, the filter screen is configured to operate, and the lower end of the filter screen is immersed in the cleaning oil in the cleaning tank.

F. Action With the above-mentioned configuration, the cooling air from which large foreign matter has been removed by the blower fan is passed through this oil bath filter section to remove even fine foreign matter for purification, and then the unit cooler body By spraying the cooling pipe to cool the cooling pipe, it is possible to prevent foreign matter from entering the gap between the forested cooling pipes and obstructing the smooth flow of the cooling air.

G. Embodiment Hereinafter, one embodiment of the air cleaning device for a cooler of the present invention will be described with reference to FIGS. 1 to 6.

In FIGS. 1 to 6, parts corresponding to those of the conventional example shown in FIGS. 7 and 8 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the partial sectional side view of FIG. 1 and the front view of FIG. 2, 1 is a transformer body, 2 is a unit cooler body, and 3 is a blower fan. In the apparatus of this example, an oil bath filter section 18 is installed between the unit cooler body 2 and the blower fan 3.

The oil bath filter section 18 is configured as illustrated in FIGS. 3 to 6. That is, the cleaning tank 19 is provided below the oil bath filter case 20,
It contains a low viscosity cleaning oil. This wash tank 19
An oil supply valve 21 and an oil discharge valve 22 are installed in this.

Inside the oil bath filter case 20, a filter screen 23 in which a fine metal mesh is formed endlessly
Are arranged so as to be stretched in a substantially rectangular ring shape by six wheels as illustrated.

Further, the drive side sprocket wheel 25 of the electric motor 24 with a reduction gear provided in the case 20 is replaced with the driven side sprocket wheel.
The drive chain belt 27 is wound around 26 and configured to interlock.

As shown in FIG. 6, a pair of screen driving sprocket wheels 28 corresponding to both lateral sides of the filter screen 23 coaxial with the driven side sprocket wheel 26 are installed.

The screen drive sprocket wheel 28 has its teeth meshed with a screen feed hole 29 continuously formed on both lateral sides of the filter screen 23, and moves as shown by an arrow A in FIGS. 4 and 5. To do so.

Further, the four even parts of the filter screen 23 stretched in a substantially rectangular shape are provided with rotatable sprocket wheels 30 and 3 for support.
Place 1,32.

The screen drive sprocket wheel 28 and the sprocket wheel 30 for supporting the lower part are arranged in the lower position in the cleaning tank 19.

Further, as shown in FIGS. 3 to 6, tension control sprocket wheels 33 of the filter screen 23 are installed on both outer sides of the center position of the filter screen 23 in the longitudinal direction. The sprocket wheel 33 for tension control is to press the central portions of the filter screen 23 against each other in an appropriate pressure so as to press the central portions of the filter screen 23 against each other, thereby eliminating the slack of the filter screen 23.

As shown in FIG. 6, at the corresponding positions of the blower fan 3 of the oil bath filter case 20, there are air intake screens.
Install 34.

Since the size of the eyes of the air intake hole screen 34 is made smaller by the size of the eyes of the screen 14 for the blower fan guard, it is possible to prevent even a very small foreign matter from entering.

In the apparatus of this example, the unit cooler body 2 and the blower fan 3 are configured in the same manner as the conventional one as shown in FIGS. 1 and 3.

In the unit cooler body 2 shown in the figure, 4 is a cooling pipe, 5 is a header, 6 is a pipe, 7 is a radiator valve, 8 is a cooling oil port, 9 is a pipe, 10 is an oil circulation pump, 11 is a cooling oil port,
12 is an oil flow support gauge.

Further, in the blower fan 3, 13 is a blower fan case, 14 is a blower fan guard screen, 15 is a blower fan blade, 16
Is a three-phase induction motor, and 17 is a blower fan holder.

Next, the operation of the device of this example will be described.

First, in the oil bath filter portion 18, as shown in FIG. 3 to FIG. 6, the electric motor 24 with a reduction gear is driven to rotate the drive side sprocket wheel 25, and the drive chain belt 27 is applied thereto. Interlocked driven sprocket wheel
26 is rotated, and the screen drive sprocket wheel 28 coaxial with this is rotated. Then, the screen feed hole 29 that meshes with the screen drive sprocket wheel 28.
The filter screen 23 having the arrow moves in the direction of arrow A in the figure.

In this state, the air for cooling is blown by the blower fan 3.
Blow from the blower fan guard screen 14 side to 2
It is passed through the overlapping filter screen 23 and sprayed on the cooling pipe 4.

At this time, foreign matters such as birds and large dusts are removed from the cooling air by the blower fan guard screen 14, and then most of the foreign matters are removed by the small-sized intake hole screen 34.

Next, when the air blown on the doubled filter screen 23 passes through the filter screens 23 containing oil and air, the fine mesh of the filter screens 23 and the oil contained therein cause minute foreign matter. Is sucked in, purified, and sprayed onto the cooling pipe 4, which cools the standing cooling pipe 4 without adhering foreign matter. A cooling oil circulation pump 10 in the transformer main body 1 is operated on the cooling pipe 4 to circulate it in the unit cooler main body 2 for cooling.

By the way, the foreign matter adhering to the filter screen 23 is used for the movement of the filter screen 23 and
In the process of entering the inside of 19 and moving inside, it sinks and accumulates at the bottom of the washing tank 19 washed with washing oil.

Then, the foreign matter accumulated in the cleaning tank 19 is discharged to the outside together with oil from the oil discharge valve 22 during the periodic maintenance. In addition, the cleaning tank 19 is removed from the oil bath filter case 20,
Remove any foreign material left on the bottom, clean the inside, and reinstall.

Further, the cleaning tank 19 is filled with new cleaning oil from the oil supply valve 21 to prepare for the next operation.

H. Effect of the Invention As described above, according to the air cleaning device for a cooler of the present invention, since the oil bath filter section is provided between the unit cooler body and the blower fan, the blower fan removes large foreign matters. By passing the sent air through this oil bath filter part, even fine foreign matter is removed and purified, and it is blown to the cooling pipe of the unit cooler body to cool it, so foreign matter enters the gap of the forested cooling pipe, Since it is possible to prevent the smooth flow of the cooling air from being impeded and to operate the unit cooler without lowering its efficiency, it is possible to prevent the disadvantage that the temperature of the transformer rises.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing an embodiment of an air purifying device for a cooler of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a schematic perspective view of a main part of an oil bath filter section thereof. Fourth
FIG. 5 is a schematic side view thereof, FIG. 5 is a schematic side view for explaining its action, FIG. 6 is a schematic front view thereof, FIG. 7 is a partial sectional side view of a conventional cooler, and FIG. It is a front view. 1 …… Transformer body, 2 …… Unit cooler body, 3 ……
Blower fan, 4 ... Cooling pipe, 18 ... Oil bath filter case, 19 ... Wash tank, 23 ... Filter screen, 24 ... Motor with reduction gear, 28 ... Screen drive sprocket wheel, 29 ... Screen feed Hole.

Claims (1)

[Scope of utility model registration request] 1. A cooler in which cooling air is sent by a blower fan to a cooling pipe that circulates cooling oil installed inside a unit cooler body, wherein an oil bath is provided between the unit cooler body and the blower fan. The filter part is arranged, the cleaning tank containing the cleaning oil is installed under the oil bath filter part, and the filter screen in which the mesh material is formed in an endless shape is supported by a plurality of sprocket wheels, and the filter screen is The lower end portion of the sprocket wheel is arranged in a rectangular annular shape so as to be immersed in the cleaning oil in the cleaning tank so as to extend in a rectangular ring shape, and at least one of the sprocket wheels is rotated in conjunction with an electric motor. According to the present invention, an air purifying device for a cooler, characterized in that the filter screen is moved.